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drm/i915: Report IOMMU enabled status for GPU hangs

Browse source 
The IOMMU for Intel graphics has historically had many issues resulting
in random GPU hangs. Lets include its status when capturing the GPU hang
error state for post-mortem analysis.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Chris Wilson 2015-08-07 20:24:15 +01:00 committed by Daniel Vetter
parent 031a8936dc
commit eb5be9d0e7
2 changed files with 6 additions and 0 deletions
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1
drivers/gpu/drm/i915/i915_drv.h
View file

@ -484,6 +484,7 @@ struct drm_i915_error_state {
struct timeval time;
char error_msg[128];
int iommu;
u32 reset_count;
u32 suspend_count;

5
drivers/gpu/drm/i915/i915_gpu_error.c
View file

@ -369,6 +369,7 @@ int i915_error_state_to_str(struct drm_i915_error_state_buf *m,
err_printf(m, "Reset count: %u\n", error->reset_count);
err_printf(m, "Suspend count: %u\n", error->suspend_count);
err_printf(m, "PCI ID: 0x%04x\n", dev->pdev->device);
err_printf(m, "IOMMU enabled?: %d\n", error->iommu);
err_printf(m, "EIR: 0x%08x\n", error->eir);
err_printf(m, "IER: 0x%08x\n", error->ier);
if (INTEL_INFO(dev)->gen >= 8) {
@ -1266,6 +1267,10 @@ static void i915_error_capture_msg(struct drm_device *dev,
static void i915_capture_gen_state(struct drm_i915_private *dev_priv,
struct drm_i915_error_state *error)
{
error->iommu = -1;
#ifdef CONFIG_INTEL_IOMMU
error->iommu = intel_iommu_gfx_mapped;
#endif
error->reset_count = i915_reset_count(&dev_priv->gpu_error);
error->suspend_count = dev_priv->suspend_count;
}